Réponse:
a) (23x+1)(-17x+1+23x+1)
(23x+1)(6x+2)
b) (13x-14)(25x-11-13x-14)
(13x-14)(12x-25)
c) (8-18x)(8-18x-16x-3)
(8-18x)(5-34x)
d) (16t+13)(21t-3+2)
(16t+13)(21t-1)
e) (-14x+5)(-4x-7)
